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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 8297118
 * @summary Verify pattern switches work properly when the set of enum constant changes.
 * @compile --release 20 EnumTypeChangesNonPreview.java
 * @compile EnumTypeChanges2.java
 * @run main EnumTypeChangesNonPreview
 */

import java.util.function.Function;

public class EnumTypeChangesNonPreview {

    public static void main(String... args) throws Exception {
        new EnumTypeChangesNonPreview().run();
    }

    void run() throws Exception {
        doRunExhaustive(this::expressionEnumExhaustive);
    }

    void doRunExhaustive(Function<EnumTypeChangesEnum, String> c) throws Exception {
        try {
            c.apply(EnumTypeChangesEnum.valueOf("C"));
            throw new AssertionError();
        } catch (IncompatibleClassChangeError e) {
            //expected
        }
    }

    String expressionEnumExhaustive(EnumTypeChangesEnum e) {
        return switch (e) {
            case A -> "A";
            case B -> "B";
        };
    }
}

enum EnumTypeChangesEnum {
    A,
    B;
}
